Other Parts Discussed in Thread: TIDA-00643, TIDA-00771, BOOSTXL-DRV8305EVM
Hi all
My customer has this question for the DRV8305-Q1:
What is the output drive capability of the current sense amplifiers ?
Please find the customer inputs posted below. They find long settling time while driving an RC from the SO2 output.
Best regards
Ueli
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Yellow : coil current ; Green : shunt voltage ; Purple : SO2 driver pin ; Pink : I_sense (see schematic below)
Comments
- 5 * Constant time of the RC filter (99.3% of the final value) = 2.7 us
- Max current sink by the filter = 3.3/36000 = 10 uA
Why there is still a voltage difference between the purple curve (output of the driver) and the pink curve (I_sense)